It is an annual, and therefore normally easily distinguished from S. halepense, but if the habit is not known then difficulties of identification are considerable.S. × drummondii has larger spikelets (6–7.5 mm compared with 4.5–5.5 mm) with 11–13 nerves on the inferior glume (compared with 7–9 of which only 2–4 are at all conspicuous in S. halepense) and a much less obviously 3-toothed tip to the glume

Range

is a tardily disarticulating element, often selected for cultivation as a fodder grass .

Notes

(and called ‘Sudan Grass’, S. sudanense (Piper) Stapf in Prain, F.T.A. 9: 113 (1917)), derived from hybridization between S. bicolor and its presumed wild progenitor S. arundinaceum (see below). It is cultivated for fodder in Mozambique, Zambia and Zimbabwe and sometimes escapes into the wild; it also occurs as a spontaneous hybrid between the wild and the grain sorghums.

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